Category: Physics

Is Negative apparent magnitude brighter? The scale for absolute magnitude is the same as that for apparent magnitude, that is a difference of 1 magnitude = 2.512 times difference in brightness. This logarithmic scale is also open-ended and unitless. Again, the lower or more negative the value of M, the brighter the star is. What […]

What are 2 materials that are good reflectors of light? Therefore, substances that could be listed on the “good reflectors” side of your table are: metals (aluminum, copper, silver, gold, spoons, etc) and mirrors. On the “poor reflectors” side of the table, the following items could be listed: cotton, paper, carpet, jeans, concrete, and grass. […]

What is a variation equation? In the equation y = mx + b, if m is a nonzero constant and b = 0, then you have the function y = mx (often written y = kx), which is called a direct variation. In this function, m (or k) is called the constant of proportionality or […]

What are the five characteristics of matter? Early Indian philosophers classified matter in the form of five basic elements – the ‘Panch Tatva’ -air, earth, fire, sky and water. Even though matter can be found all over the Universe, you only find it in a few forms, based on their physical and chemical properties. What […]

What are the laws of reflection class 7? Laws of reflection: The angle of incidence is always equal to the angle of reflection. The incident ray, the reflected ray and the normal to the surface at the point of incidence lie in the same plane. Did the Mongols invade Afghanistan? In the Mongol invasion of […]

Which country has reached Mars? India Are Mars rovers still active? As of May 2021, Curiosity is still active, while Spirit, Opportunity, and Sojourner completed their missions before losing contact. Is India the first country to reach Mars? It made India the first Asian nation to reach Martian orbit and the first nation in the […]

What daily value is considered high in a nutrient? As a general guide: 5% DV or less of a nutrient per serving is considered low. 20% DV or more of a nutrient per serving is considered high. What is the 5% and 20% rule? The 5/20 Rule (Purple) Always remember the 5/20 rule: 5% or […]

What are the 3 lines of immune defense? The human body has three primary lines of defense to fight against foreign invaders, including viruses, bacteria, and fungi. The immune system’s three lines of defense include physical and chemical barriers, non-specific innate responses, and specific adaptive responses. What are three major barriers to pathogens? Natural barriers […]

What do you mean by physical? Physical indicates connected with, pertaining to, the animal or human body as a material organism: physical strength, exercise. Bodily means belonging to, concerned with, the human body as distinct from the mind or spirit: bodily pain or suffering. What do you mean by physical causes? Physical qualities, actions, or […]

When do you approach a non powered vessel? When approaching a non-powered craft, such as a sailboat or canoe, you are the give-way craft and do not have the right-of-way. You must take early and substantial action to keep clear of non-powered craft. You should alter your speed and course, and approach non-powered craft with […]